Octagon
To study solid objects whose faces are all polygons.
A polyhedron is a solid object all of whose faces are polygons.
pyramid
It is a crystal, all of whose faces are polygons.
Platonic solids.
It is a 3-dimensional shape whose faces are all polygons.
A platonic solid is a special kind of polyhedron. A polyhedron is a 3-D figure whose faces are polygons.In a platonic solid all faces are identical regular polygons. A polyhedron has faces, edges, and vertices. The numbers of each are related by Euler's formula, V+F=E+2
A polyhedron is a 3-dimensional shape whose faces are all polygons.
It is a prismoid - a prism-like solid whose lateral faces are not perpendicular to the bases.It is a prismoid - a prism-like solid whose lateral faces are not perpendicular to the bases.It is a prismoid - a prism-like solid whose lateral faces are not perpendicular to the bases.It is a prismoid - a prism-like solid whose lateral faces are not perpendicular to the bases.
Start with the definition of a polygon. A polygon is a 2-dimensional (flat) surface all of whose boundaries are straight lines. Then, a polyhedron is a 3-dimensional (solid) object all of whose faces are polygons.
One whose boundaries are straight lines.
A prism whose ends are polygons with n sides will have 2n + 2 faces in all.